Motor-controller.



E T AVAILAELE COP No. 845,831. I PATENTED MAR. 5,1901.

- T. s, WATSON.

MOTOR CONTROLLER.

APPLICATION FILED JULY 12, 1906.

east c UNITED STATES PATENT OFFICE.

THOMAS S. WATSON, OF MILWAUKEE, WISCONSIN.

MOTOR-CONTROLLER.

Specification of Letters Patent.

:atentea March 5, 1907.

Application filed July 12,1906. Serial No. 325.847.

T0 aZZ whom it may concern:

Be it known that I, THOMAS S. WATSON, a citizen of the United States,residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented new and useful Improvements in Motor-Controllers, of which the following is a full, clear, concise,

and exact description, reference being bad to,

Another object of my invention is to pm. vide a controller which shall while periodic ally reversing the direction of operation of the motor at the same time insert each time the motor is started in a reverse direction a certain amount of resistance in circuit therewith to prevent a sudden'rush of current to attain full speed.

the motor, this resistance being arranged to be gradually cut out to permit the motor to Another object of my invention is to provide, in addition to a controller which shall automatically reverse the direction of operation of the motor, means for starting and stopping the motor independently of the reversnig-controller.

I have illustrated my invention in the accompanying drawing, which is a diagrammatic view of my preferred construction.

In the construction illustrated in the drawing, which is adapted for controlling four motors, I mount upon a suitable base or'support 1 two drum-controllers 2 and 3, which are suitably connected together by means of a coupling 4. Mounted upon the shaft of the controller 2 is a gear-wheel 5, which is arranged to mesh with a pinion 6, mounted upon the shaft 7 of a motor 8. The controller 2 is arranged to control the direction of operation of the motors 9 and 10, and controller 3 is arranged to control the direction of operation of the motors 11 and 12.

24, 2 4 ,2 9, 24 24 and 24 23 and 24 are electrically'connected by con In addition to the controllers 2 and 3, I preferably mount upon the same base a resistance-box 13, which carries resistance-coils 14, 15, 16, and 17, arranged in circuit with motors 9 and 10, 12 and 11, respectively.

Each one of the motors 9, 10, 11, and 12 is provided with a starting-box having a resistance 18, sections of which are arranged to be connected with contacts'19,j0ver which is arranged to' sweep a controlling-arm 20. The motor 8 is preferably provided with a variable resistance 8, by which the speed thereof is controlled, and may be mounted upon the base 1, if so desired; .1

Inasmuch as the. connections and arrange. ments ofcircuit for each'rof the controllers 2 .and 3 are the'same',itwill onlybe necessaryfor me to describe oneof the same, andI will therefore'o'nly refer to? the construction and arrangement of the controller 2 .aiid the motorsto which it is connected. The reversing-controller 2' is rotated continuously in one direction by. the'motor 8 and-is provided withtwo sets. or contacts2-1, 2,1, 21

21 21 .22, 22 ,"22?,"",f2 2,' arr-deaf; The contacts-21 to 21 are arranged as-shown and are all electrically 'connectedfif Contacts 22 to22 are all electrically connected and are arranged as showni The 'controllerl' is also provided with two setsof stationary brushes, numl ered 23, 23 23, 23, 23, and 23, and The brushes ductor 25, and the brushes 23* and 24 are electrically, connected by conductor 26. The brush 24 is connected by a conductor 27, through the knife-switch 28 and the-blowout fuses 29, with one side 30 'of,.the 'main circuit. Brush [2. 1 is connected by conductor 31 throughtheknife-switch 2'8 "and blow out fuse 29- with theopposite side 32 of the circuit. Thebrusli 24 is also connected by conductor33 with. one terminalof the field-winding'34 of'th'e' motor 9, the other terminal ofv which is connected by conductor 35 with the brush 24 A branch conductor 36 is connected with one terminal of the field-windin 37 of the motor 10, the opposite termina of. said field-winding beingconnected by a conductor 38 with the conductor 35. The resistance 14 is divided in sections,

each section leing connected to binding posts numbered 39*, 39, 39 and 39, which are in turn connected with brushes 23 23,

23, and 23 respectively, byconductors 40, 41, 42, and 43. The resistance is divided in sections connected with binding-posts 44*, 44, 44 and 44*, which in turn are connected with the brushes24 24, 24 and 24 byconduct-ors 45, 46, 47, and 48, respectively. Brush 23 is connected by conductor 49 with the last of the contacts-19 of the starting-box for the motor 9. The

movable member of said starting --box' is connected by conductor 50 with one terminal of the armature 51, the opposite terminal of which is connected by conductor 52 with the binding-post 44 The brush 24 is connected by conductor 51 with the last of the contacts 19 of the starting box for the motor 10, the arm 20 of which is connected by conductor 52 with one terminal of the armature 53- of the motor 10, the opposite terminal of which is connected by conductor 54 with the binding-post 39 of the resistance- 14. The motor 8 is permanently connected with the mains and 32 and is controlled by a switch 55, which is independent of the switch 28, whereby 'the motor 8 may be run'independently of the motors 9 and 10,11 and 12.

The operation of the device is as'follows:

When the switch is closed, circuit is closed.

through the motor 8, which is started and rotates the drum-controller 2. The circuit of the motors desired to be started may be closed through'the agency'of the startingbox, and we will assume for the purpose of explanation that the motors'9 and 10 have beenfstarted by moving the movable member 20 of the starting-box to the extreme right, thereby cutting out the resistance 18 from the circuit thereof. The motors having thus been started, with the drum 2 rotating in the direction of the arrow, contacts 22 and 22* will engage the brushes 23 and 23 and atthe same time contacts 21 and 21 will engage the brushes 24 and 24 Under these conditions the circuit will be closed as follows: from main 30, by conductor 45, to brush 24, thence to contact 21, from contact 21' to contact 21*, brush 24 conductor 45, through the resistance 15, by conducter 48, to brush 24, the'nce by conductor 51, through the starting-box of'the motor 10, by conductor 52, through the armature 53 of the motor 10, by conductors 54 and 40 to brush 23", from brush 23 to contact 22*, thence to contact 22, brush 24 and by conductor 31 to the opposite main 32 of the circuit. At the same time a branch circuit is established from the binding-post 44 through the conductor 52, through the armature 51 of the motor 9, thence by conductor 50, through the starting-box of the motor 9, thence by the conductor 49 to the brush 23 conductor 43, through the resistance 14, by conductor .brushes 23, 23 to 23.

' 40 to brush 23 contact 22 to contact 22,

and brush 24 thence by conductor 31 to the opposite side 32 of the circuit. As the drum continues to revolve the contacts 21, 21, and 21 will respectively engage brushes 24, 24 and 24 and contacts 22, 22, and 22 will respectively engage contact-brushes 23, 23 23*, thereby cutting out, as each contact engages a brush, a section of the resistances 14 and 15 from the respective motors, and the motors will build up in speed until they are finally running at full speed. A continued rotation of the drum causes the con-.

tacts 22 to 22 to pass ofi of brushes 23 to 23 and engage brushes 24 to 24 while the contacts 21 to 22 will respectively engage the Assuming'for the purpose of illustration that the contacts 21 and 21 have engaged the brushes'23 and 23 andthe contacts 22' and 22 have engaged brushes 24 and 24", then the circuit through the motors will be reversed with all resistance 14 and 15 in circuit, and 'as-the drum continues to rotate the resistance will be gradu ally cut out until the motors are running "full speed in the reverse direction. The fieldcircuits of the motors 9jand 10 are always the same, conductor 33being connected permanently to brush 24 andconductor 35 being connected permanently to' brush '24; By this arrangement the field-circuit will always be byconductor 33 through the field 34 of the motor'9, thencejby conductor 35 back to the brush38. The conductors 33 and 35 are connected, respectively, with theconductors 36 and 38 and also connect motor 10 in circuit. 5* V The controller 2, which controls the motors 12 and 13, operates similarly to the manner in which the controller 2 operates, and it h of, the

is therefore unnecessary to'describe the operation thereof. If. desired, an additional number of controllers may be connected with the I controllers 2 and 3 in the same manner as they are here shown connected, and, an addithe operating-motors for operating a controller, which intermittently reverses the direction of the motors. It will also be noted that I have provided means for stopping and starting the motors independently of the controller 2 and which will be operative no matter what position the'controller 2 may be occupying.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is t 1. The combination with an electric motor, of a controller therefor for intermittently changing the direction of current in one of the elements of said motor, and means inde- BEST AVAILABLE COP".

pendent of said motor for operating said controller continuously.

2. The combination with an electric motor, of an automatic controller operated independently of said motor for intermittently changing the direction of current through one element thereof, resistance in circuit with said motor arranged to be inserted and gradually cut out upon each reversal of the motor.

3. The combination with an electric motor, of an automatic controller therefor for intermittently changing the direction of operation of the same, and a starting-box for said motor operative independently of said re versing-controller.

4. The combination with a motor, of a controller therefor for intermittently changing the direction of operation thereof, suitable resistance in the motor-circuit arranged to be inserted and gradually cut out upon each change of.direction of operation, and a starting-box for said motor operative independently of said controller.

5. The combination with a plurality of electric motors, of a continuously-operated common controller therefor for intermittent-1y changing the direction of current in one of the elements of said motors, and means independent of said motors for operating said controller.

6. The combination with a plurality of electric motors, of a continuously-operated common controller for intermittently chang ing the direction of current through one element of said motors, and a resistance in circuit with each of said motors arranged to be inserted and gradually out out upon each change of direction of operation thereof.

7. The combination with a plurality of electric motors, of a common controller therefor for intermittently changing the direction of operation of the same, and a starting-box for each of said motors operative independently of said controller and of the startingboX for the other motor.

8. The combination with a plurality of motors, of a common controller therefor for intermittently changing the direction of operation thereof, resistance in each of said motor-circuits arranged to be inserted and gradually cut out upon each change of direction of operation of the motors, and a starting-box for each of said motors operative independently of said controller and independently of the starting-box of the other motor.

9. The combination with a plurality of electric motors, of a common controller for intermittently changing the direction of current through one element thereof, resistance in circuit with each of said motors arranged to be inserted and gradually out out upon each change of direction of operation of the motors, and means independent of said motors for continuously operating said controller.

10. The combination with a plurality of electric motors, of a common controller therefor for intermittently changing the direction of current in one element of said motors, and an electric motor for operating said controller continuously.

11. The combination with a plurality of electric motors, of a single drum-controller therefor, and a resistance arranged in circuit with each of said motors, said controller being arranged to alternately change the direction of current in one of the elements of said motors, and upon each change of direction of current to insert and gradually cut out the resistance from the circuit of said motors.

12. The combination with a plurality of motors arranged in groups, a controller for each of said groups for intermittently changing the direction of current in one element of the motors, and a common means independent of the motors for operating all of said controllers.

13. The combination with a plurality of electric motors, of a common controller therefor for intermittently changing the direction of operation of said motors, an electric motor for operating said controller con tinuously, and. means for varying the speed of said motor.

1 1. The combination with a plurality of motors, of a controller therefor for intermittently changing the direction of operation of said motors, an electric motor for operating said controller, and a variable resistance in circuit with said motor.

15. The combination with an electric motor, of an automatically-operated rotating drum-controller having contacts thereon for intermittently changing the direction of current in one of the elements of the motor, and means independent of said motor for rotating said controller.

16. The combination with a motor, of resistancein circuit therewith, a rotating drumcontroller for intermittently changing the direction of current through one element of said motor and for inserting and gradually cutting out said resistance upon each reversal of the motor, and a motor independent of the first-mentioned motor for rotating said controller.

17. The combination with a plurality of electric motors, of a common rotating drumcontroller therefor having contacts therein arranged to intermittently change the direction of current in one of the elements of said motor and a motor independent of said firstmentioned motor for continuously opera-ting said controller.

18. The combination with a plurality of ICC electric motors, of a resistance in circuit with In Witness whereof I have hereunto subeach of said motors, a common rotating scribed my name 111 the presence of two Witdruln-controller for lntermittently changing nesses.

the direction of current of said motors and THOMAS S. VAT SON. 5 for inserting and gradually cutting out said Vitnesses:

resistance upon each change of direction of F. H. PETRIE,

operation of the motors. O, F. PII-IL, Jr. 

